Britney Spears Alanis Morissette Cover “You Oughta Know”: "

“You Oughta Know” Britney Spears is a big Alanis Morissette fan.

The pop princess surprised fans in Greensboro, North Carolina by belting out a cover of the ‘90s rocker’s breakout hit during a stop on “The Circus Starring Britney Spears” Tour Saturday night.